public static Triangle Create(int a, int b, int c)
{
Triangle temp = new Triangle();
temp.A = a;
temp.B = b;
temp.C = c;
return temp;
}
public override bool CreateGeometry(RenderContext renderContext)
{
base.CreateGeometry(renderContext);
if (GeometryCreated)
{
return(true);
}
Bitmap bmp = null;
if (dataset.WcsImage != null)
{
WcsImage wcsImage = dataset.WcsImage as WcsImage;
bmp = wcsImage.GetBitmap();
texture2d = bmp.GetTexture();
if (bmp.Height != wcsImage.SizeY)
{
PixelCenterY += bmp.Height - wcsImage.SizeY;
}
}
GeometryCreated = true;
for (int i = 0; i < 4; i++)
{
RenderTriangleLists[i] = new List <RenderTriangle>();
}
ComputeMatrix();
if (bmp != null && renderContext.gl != null)
{
Height = bmp.Height;
Width = bmp.Width;
}
else
{
Height = texture.NaturalHeight;
Width = texture.NaturalWidth;
}
double latMin = 0 + (ScaleY * (Height - PixelCenterY));
double latMax = 0 - (ScaleY * PixelCenterY);
double lngMin = 0 + (ScaleX * PixelCenterX);
double lngMax = 0 - (ScaleX * (Width - PixelCenterX));
TopLeft = GeoTo3dTan(latMin, lngMin);
BottomRight = GeoTo3dTan(latMax, lngMax);
TopRight = GeoTo3dTan(latMin, lngMax);
BottomLeft = GeoTo3dTan(latMax, lngMin);
Vector3d topCenter = Vector3d.Lerp(TopLeft, TopRight, .5f);
Vector3d bottomCenter = Vector3d.Lerp(BottomLeft, BottomRight, .5f);
Vector3d center = Vector3d.Lerp(topCenter, bottomCenter, .5f);
Vector3d rightCenter = Vector3d.Lerp(TopRight, BottomRight, .5f);
Vector3d leftCenter = Vector3d.Lerp(TopLeft, BottomLeft, .5f);
if (renderContext.gl == null)
{
vertexList = new List <PositionTexture>();
vertexList.Add(PositionTexture.CreatePosSize(TopLeft, 0, 0, Width, Height));
vertexList.Add(PositionTexture.CreatePosSize(TopRight, 1, 0, Width, Height));
vertexList.Add(PositionTexture.CreatePosSize(BottomLeft, 0, 1, Width, Height));
vertexList.Add(PositionTexture.CreatePosSize(BottomRight, 1, 1, Width, Height));
childTriangleList = new List <Triangle>();
if (dataset.BottomsUp)
{
childTriangleList.Add(Triangle.Create(0, 1, 2));
childTriangleList.Add(Triangle.Create(2, 1, 3));
}
else
{
childTriangleList.Add(Triangle.Create(0, 2, 1));
childTriangleList.Add(Triangle.Create(2, 3, 1));
}
int count = 3;
while (count-- > 1)
{
List <Triangle> newList = new List <Triangle>();
foreach (Triangle tri in childTriangleList)
{
tri.SubDivide(newList, vertexList);
}
childTriangleList = newList;
}
double miter = .6 / (Width / 256);
foreach (Triangle tri in childTriangleList)
{
PositionTexture p1 = vertexList[tri.A];
PositionTexture p2 = vertexList[tri.B];
PositionTexture p3 = vertexList[tri.C];
RenderTriangleLists[0].Add(RenderTriangle.CreateWithMiter(p1, p2, p3, texture, Level, miter));
}
}
else
{
//process vertex list
VertexBuffer = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ARRAY_BUFFER, VertexBuffer);
Float32Array f32array = new Float32Array(9 * 5);
float[] buffer = (float[])(object)f32array;
int index = 0;
index = AddVertex(buffer, index, PositionTexture.CreatePos(bottomCenter, .5, 1)); //0
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomLeft, 0, 1)); //1
index = AddVertex(buffer, index, PositionTexture.CreatePos(BottomRight, 1, 1)); //2
index = AddVertex(buffer, index, PositionTexture.CreatePos(center, .5, .5)); //3
index = AddVertex(buffer, index, PositionTexture.CreatePos(leftCenter, 0, .5)); //4
index = AddVertex(buffer, index, PositionTexture.CreatePos(rightCenter, 1, .5)); //5
index = AddVertex(buffer, index, PositionTexture.CreatePos(topCenter, .5, 0)); //6
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopLeft, 0, 0)); //7
index = AddVertex(buffer, index, PositionTexture.CreatePos(TopRight, 1, 0)); //8
PrepDevice.bufferData(GL.ARRAY_BUFFER, f32array, GL.STATIC_DRAW);
// process index buffers
for (int i = 0; i < 4; i++)
{
index = 0;
TriangleCount = 2;
Uint16Array ui16array = new Uint16Array(TriangleCount * 3);
UInt16[] indexArray = (UInt16[])(object)ui16array;
switch (i)
{
case 0:
indexArray[index++] = 7;
indexArray[index++] = 4;
indexArray[index++] = 6;
indexArray[index++] = 4;
indexArray[index++] = 3;
indexArray[index++] = 6;
break;
case 1:
indexArray[index++] = 6;
indexArray[index++] = 5;
indexArray[index++] = 8;
indexArray[index++] = 6;
indexArray[index++] = 3;
indexArray[index++] = 5;
break;
case 2:
indexArray[index++] = 4;
indexArray[index++] = 0;
indexArray[index++] = 3;
indexArray[index++] = 4;
indexArray[index++] = 1;
indexArray[index++] = 0;
break;
case 3:
indexArray[index++] = 3;
indexArray[index++] = 2;
indexArray[index++] = 5;
indexArray[index++] = 3;
indexArray[index++] = 0;
indexArray[index++] = 2;
break;
}
IndexBuffers[i] = PrepDevice.createBuffer();
PrepDevice.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, IndexBuffers[i]);
PrepDevice.bufferData(GL.ELEMENT_ARRAY_BUFFER, ui16array, GL.STATIC_DRAW);
}
}
return(true);
}